S. Fre´6ille et al. / Tetrahedron Letters 42 (2001) 4609–4611
4611
References
46.9, 92.7, 163.3, 193.6; Eb (0.1 mmHg) 105°C; [h]2D0 −92
(c 1.0, EtOH).
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12. Spectral data for 1a: 1H NMR (250 MHz, CDCl3): l 1.10
(d, 3H, J=6.4 Hz), 1.20–1.80 (m, 6H), 2.14 (s, 3H), 2.60
(d, 2H, J=6.3 Hz), 2.72 (m, 1H), 3.05 (m, 1H), 10.51 (m,
1H); 13C NMR (62.5 MHz, CDCl3): l 22.8, 24.5, 30.6,
31.6, 33.6, 50.2, 52.1, 52.4, 208.5; [h]2D0 −41 (c 0.9, EtOH).
13. Spectral data for 1b·HCl: 1H NMR (250 MHz, CDCl3): l
0.85 (t, 3H, J=7.4 Hz), 1.10–1.24 (m, 10H), 1.53 (d, 3H,
J=6.5 Hz), 2.85 (m, 1H), 3.00 (m, 1H), 9.01 (m, 1H); 13C
NMR (62.5 MHz, CDCl3): l 13.7, 18.8, 19.5, 22.9, 27.5,
30.7, 35.2, 54.5, 58.4; F (acetonitrile) 210°C; [h]2D0 +12 (c
1.2, EtOH).
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18. Spectral data for 1c: H NMR (250 MHz, CDCl3): l 1.00
1
J. Chem. 1991, 69, 1201–1206.
1
10. Spectral data for 4: H NMR (250 MHz, CDCl3): l 1.10
(d, 3H, J=6.2 Hz), 1.10 (d, 3H, J=6.2 Hz), 1.20–1.80
(m, 8H), 2.60 (m, 1H), 2.90 (m, 1H), 4.10 (m, 1H); 13C
NMR (62.5 MHz, CDCl3): l 22.3, 23.6, 24.2, 29.9, 32.9,
43.2, 52.9, 54.9, 64.4; [h]2D0 −18 (c 0.63, CHCl3).
(d, 3H, J=6.4 Hz), 1.25–1.87 (m, 4H), 1.92 (s, 3H), 2.20
(m, 2H), 3.41 (m, 1H), 4.85 (s, 1H), 11.0 (s, 1H); 13C
NMR (62.5 MHz, CDCl3): l 18.5, 22.4, 27.8, 28.2, 30.2,
.